Improvement in riveting devices



2 Sheets-Sheet 1. E. BOURNE. Riveting Device.

\ No. 204,476. Patented June 4,1878.

Fig.2.

WITNESSES: [N VENTOR JWM %MQW ul g A TTORNEY NJUERS. PHG YO UTiOGRAFHER.WASHINGTON. D C.

2 Sheets-Sheet 2. E. BOURKE; Riveting Denice.

No. 204,476; r Patented June 4, 1878.

Jays.

N. PETERS, PMOTU-I-[TNOGRAPHBL WISMINGTON. D C.

UNITED STATES anti Mtg U it EDWARD BOURNE, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN RI VETING DEVICES.

Specification forming part of Letters Patent No. 204,476, dated June 4,1878; application filed February 18, 1878.

To all whom it may concern:

Be it known that I, EDWARD BOURNE, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have made a new and useful MachineforEnlargingtheEnds of Tubular Rivets upon Fish-Bars, which will beread- -ily understood from the following description, taken inconnection with the accompanying drawings, wherein- Figure 1 representsa perspective view of two railwayrails joined together by means offish-bars and tubular rivets; Fig. 2, a transverse vertical section ofone of said rails with the splice-plate, washers, and tubular rivet;Fig. 3, an end elevation of one of the rails, and therewith theimplement for enlarging the ends of the tubular rivet; Fig. 4, asectional view of a railway-rail, the splice-plate, rivet, and implementfor unfastening and releasing said rivets.

Heretofore all tubular rivets used in uniting material objects have forthat purpose their ends spread or flared out, so as to form thereon asort of hollow conical head or flange, similar to the ordinary eyelet.Where a mere union of parts is wanted, the flaring tubular rivet willanswer that end; but when once placed, the difficulty of withdrawalmakes it, for some purposes, very objectionable.

By my invention a head, a, is formed on both ends of the tubular rivet bat one and the same time, and of such a character as not only makes abetter and more substantial head than when flared, but, if necessary,admits of certain and ready removal, as occasion may require.

The rail 0, splice-plates d d, and washers e e may be of such forms asare most generally used. To unite these splice-plates firmly to therails, and thereby form as near as may be a perfect joint, I make use ofa tubular rivet, b, instead of the ordinary screw-bolt and nut. Theserivets are to be of such a length as that their ends will project abouthalf an inch when placed in the holes through the splice-plates, rails,and washers, and thick enough to withstand successfully thesettling-down process, presently described. As placed in properposition, as project plates are,

soon as a rivet, b, is so much of its ends beyond and outside of thespliceby means of my machine, formed into a square shoulder next andagainst each splice-plate d or washer e, as the case may be, withoutenlarging the diameter of the interior of tube. To accomplish this Istave, by compression, the projecting ends of these rivets, and to thatend make use of a strong metallic U-shaped clamp, H, the extremities ofwhich are just far enough apart to answer the pur poses of itsconstruction. Through one end of this clamp passes a hollow, but verypowerful, screw, J, on the outer end Kof which provision is made forturning it by means of a wrench or rod, as in other contrivances of asimilar sort. In the hollow of the opposite end of this screw is placeda steel tool, I, furnished with a conical projection, as shown in dottedlines, Fig. 3, the largest diameter of which just equals the size of thehole through the tubular rivet intended to be operated on. Immediatelyaround the point of its largest conical diameter the tool is encircledby a collar or flange, S, in width a little more than the thickness ofthe tubular rivet. Supported by the other leg of the U-shaped clamp H,and on the same axial line, is arranged a hollow seat, R, as shown moreclearly in Fig. 4; and within this seat I secure a tool composed of ashort rod, as indicated by dotted lines B, Fig. 3, the same having acollar, t, and a conical end or mandrel, I, (also shown by dotted lines,Fig. 3,) said mandrel corresponding in size and form to the conicalmandrel l upon the opposite end of the U-shaped bar 11.

On the application of a long lever to the screw a powerful pressure maybe brought to bear on both ends of the rivet simultaneously, suflicientto crush, stave up, and thicken the projecting ends, so as to form ahead thereon, and that without flaring or spreading its central bore.Thus each rivet may be fastened in regular successive order.

In case it should become necessary to remove a rivet, theconically-pointed tools are to be taken out of the clamp, so that on theapplication of the clamp to the rivet it will be found that the hollowof the screw will fit over one end of the rivet, and the hollow of theseat R in the opposite leg of the clamp over the other end of the rivet,andwhen screwed tightly down, on the insertion of a flat or square endedsteel rod or drift, X,in the hollow of the screw,

the rivet may be, by a few sharp blows, driven J and also the mandrel l,of conical form, the

entirely out. collar 1, and suitable rod or shank thereof, se- I claimcured in the hollow collar R, substantially as As a mechanism forenlarging the ends of shown and described.

tubular rivets upon fish-bars, the U-shaped EDWARD BOURNE.

bar H, in combination with the conicalshaped mandrel I, with collar S,and secured in place by a connecting-rod within the hollow screw \Vitnesses:

J osmn W. ELLs, ROBERT S. SILL.

